Wrench



F. W. BLACKMAR.

WRENCH.

APPLICATION FILED APR,22,1921.

Patented July 25, 1922.

unrrso STATES],

PATENT OFFICETH FRED W. BLACKMAR, OF PROVIDENCE, RHODE ISLAND, ASSIGNORONE-HALF TO LEWIS M. BLACKMAR, OF I ROVIDENCE, RHODE ISLAND.

WRENCH.

Specification of Letters Patent. Pate t d J l 25 1922 Application filedApril 22, 1921. Serial No. 463,628.

To all whom it may concern: I

Be 'it known that I; FRED W. BLeoKMAR, a citizen of the United States,residing at Providence, in the county of Providenceand State of RhodeIsland, have invented certain new and useful Improvements in renches, ofwhich the following is a specification.

This invention relates to improvements 1n socket wrenches and has as oneof its pri-- mary objects to provide a wrench of this type which will beadapted for application to nuts or bolts located in places inaccessibleto the ordinary wrench and whether the nut or bolt be located behind anupstanding flange or other part or opposite or adjacent to a part whichwould ofier an obstruction to the use of the ordinary wrench. Anotherobject of the invention is to provide a socket wrench which will beapplicable to different nuts or bolts-having faces of different numberand which may furthermore be. applied to the nut or bolt to be tightenedor loosened, with the handle of the wrench extending at practically anyangle made necessary by reason of the presence of obstructions.

In the accompanying drawings:

Figure l is a top plan view of the wrench embodying the invention, ahexagonal nut being shown in dotted lines within the socket of thewrench;

Figure 2 is a view partly in side elevation and partly in longitudinalsection through the wrench;

Figure 3 is a View similar to Figure 2 illustrating one mode ofapplication of the wrench.

Generally speaking, the wrench comprises a head which is indicated bythe numeral 1, and a handle which is indicated by the numeral 2. Thehead 1 has upperand lower sides 3 and 4 located in parallel planes, andthe head is preferably exteriorly cylindrical except that at its lowerportion it is exteriorly beveled, as at 5, immediately above the lowerface 4 so as to adapt the lower end of the head to more readily escapeany obstructions whichmay be in the way of its application to a nut orbolt. The head is formed with a socket 6 concentric to the headon nut towhich the head of the wrench is applied, as clearly shown in Figures 1and 3 of the drawings, the notches 8 are substantially equally spacedfrom each other throughout the circumferential extentof the lnteriorwall of the socket and are of a number which is a multiple of four' andsix, in the present instance twelve, whereby the wrench may be usedeither with square or-hexagonal nuts and may be applied to the same whenlocated at a variety of different angular positions relative thereto,thus permitting the same wrenchto be used both upon a given standardsize square nut and a standard size hexagonal nut and applied theretofrom a plurality of different angular positions to adapt the wrench notonly for use with both square and hexagonal nuts but particularlyadapting the same for use in positions where the locations of'adjacentparts prevent the wrench from being given more than a small angularmovement at each application.

The handle 2 extends substantially at right angles radially withrelation to the axis of the socket 6 and is joined with one side of thehead 1 by an integral connecting shank 9. This shank portion 9 extendsdiagonally,substantially at an angle of45 between the handle 2 and theadjacent side of the head 1, being integrally united with the said sideof the head at a point suitably spaced above the lower face & thereofand practically flush with the' up er face 3. .Thus the lower endportion of t e head may be engaged with a bolt head or nut which isseated for example in a socket or countersink without the end of theshank interfering with the introduction of said end of the head into thesocket, the shank 9 under such conditions of use extending upwardly atan angle of inclination from the obstruction. Under other conditions ofuse as for example as illustrated in Figure 3, the wrench may best beemployed by applying its upper end to the nut or bolt to be loosened ortightened. It will therefore be evident that due to the angulardisposition of the shank 9 with relation to the handle 2 and head 1 ofthe wrench, the wrench is adapted to be employed either in the positionshown in Figures 2 and 3 or in an inverted position, and in locationswhere it would be impossible to make use of the wrench if the handle 2extended directly radial from the side of the head 1 in a plane betweenthe upper and lower faces thereof.

Having thus described the invention, What is claimed as new is:

1. A socket wrench comprising a cylindrical head, a handle, and a shankconnect ing one side of the head and the handle, the' being providedwith a circumferential series of notches to receive the corners of a nutor the like, and the head being exteriorly tapered circumferentially inthe direction away from the juncture of the shank with-the head.

2. A socket wrench comprising a head having a socket the interior wallof which is provided with a circumferential series of notchessubstantially equally spaced from each other throughout thecircumferential extentof the interior wall of the socket, the number ofnotches formed in the socket maaoee being in excessof six and a multipleof both six and four to receive the corners of a four- 3. A socketwrench comprising a head, a

handle, a shank connecting one side of the head and the forward end ofthe handle, the said handle and one face of the head occupyingsubstantially parallel planes, and the said shank extending diagonallybeyond the saidface of the head and between the same and the handle, thehead having a socket the interior wall of which is provided with acircumferential series of notches equally spaced from each otherthroughout the circumferential extent of the interior wall of the socketthe number of notches formed in the socket being in excess of six and amultiple of both siX and four to receive the corners of a four-sided orsix-sided nut when located at a variety of different angular positionsrelative thereto.

In testimony'whereof I afiix my signature.

FRED w. BLAOKM-AR. [1 8.

. '3 DISCLAIMER 1,424,069.Fred W. Blackmar, Providence, R. I. Wrench.Patent dated July 25, 1922. Disclaimer filed September 6, 1932, by thepatentee, assignee, Snap-On Tools, Inc. consenting.

Hereby enters this disclaimer of so much of claims 1, 2, and 3 of saidspecification as is in excess of the following:

1. A socketwrench comprising a cylindrical head, a handle, and a shankconnecting one side of the head and the handle, the said handle and oneend of the head occupying substantially parallel planes, and the saidshank extending diagonally beyond the said end of the head and betweenthe same and the handle, and the juncture of the shank with the side ofthe head being spaced inwardly from the plane of the opposite end of thehead, said head being sufficiently elongated or of a depth to at leastequal standard nut thickness and extend beyond said shank juncture toafford access to restricted locations, the internal wall of the headbeing provided with a circumferential series of notches to receive thecorners of a nut or the like, the number of notches formed in theinternal wall of the head, being in excess of six and a multiple of bothsix and four, said notches having a suflicient depth to at least equalstandard nut thickness, and the head being exteriorly taperedcircumferentially in the direction away from the juncture of the shankwith the head.

2. A socket wrench-comprising a cylindrical head having a socket ofsufficient depth to at least equal standard nut thickness, the interiorwall of said socket being provided with a circumferential series ofnotches substantially equally spaced from each other throughout thecircumferential extent of the interior wall of the socket, the number ofnotches formed in the socket being in excess of six and a multiple ofboth six and four to receive the corners of a four-sided or six-sidednut when located at a variety of different angular positions relativethereto, said notches having a sufficient depth to at least equalstandard nut thickness for complete registry therewith, and a handleconnected to said head and extending outwardly therefrom.

"3. A socket wrench comprising a cylindrical head of comparatively thinwall thickness, a handle, a shank connecting one side of the head andthe forward end of the handle, the said handle and one face of the headoccupying substantially parallel planes, and the said shank extendingdiagonally beyond the said face of the head and between the same and thehandle,lthe head having a socket of suflicient depth to at least equalstandard nut-thickness, said head socket extending beyond its juncturewith the handle shank to afford access to restricted locations, theinterior wall of said socket being provided with a circumferentialseries of notches equally spaced from each other throughout thecircumferential extent of the interior wall of the socket, the number ofnotches formed in the socket being in excess of six and a multiple ofboth six and four to receive the corners of a four-sided or six-sidednut when located at a variety of different angular positions relativethereto, said notches having a sufficient depth to at least equalstandard nut thickness for complete registry therewith.

[Oflicial Gazette September 27, 1932.]

